You can enjoy a tour of the route by clicking on “Tools” > “Play tour”.

The trick is to minimize your time on Route 408 as much as possible. The above route follows Route 408 after entering Chiba Prefecture, but I believe this part can be improved. Once I encountered a very slow, huge trailer three cars ahead of me carrying a very big part of something. It almost made me late for my flight that time.

I welcome other recommendations, impressions, and feedback. Let’s develop a faster route to Narita!